Nanaimo—Cowichan is a former federal electoral district in British Columbia, Canada, which was represented in the House of Commons of Canada between 1988 and 2015.

It was located on Vancouver Island.

It included, together with more rural areas, the southern portion of the city of Nanaimo, the city of Duncan, the town of Ladysmith, and the District of North Cowichan.

The electoral district was created in 1987 from parts of Nanaimo–Alberni and Cowichan—Malahat—The Islands ridings.

This riding has elected the following members of Parliament: